@"Achim (Boinx)" Gooosh ... I swear I'm already familiar with the creation of custom layers ... but ... I never thought to look into this folder ... I always go, mechanically, to the Resources folder ... I'm so stupid sometimes ^^

Create a logic that will split up this string into different single lines and output it one by one over time (use the LUA patch of mimoLive because this is much stable than JAVA Script in QuartzComposer. It will be hard to implement this in vanilla QC, you may also find some code in one of the existing mimoLive layers )

use a "Watcher" patch to trigger the animation when ever the text line changes.

create an image from the string (Image With String patch) and capture it with a "Sample And Hold" patch so you have it for the transition (triggered by the Watcher)

Use a "Time Line" patch to define the timing of the transition. Make sure to set the Timebase of the patch from "Parent" to "External" (right click on the patch itself to change this)

Use a Stop Watch patch to control the "Timeline" patch with the "Patch Time". Reset the stopwatch when ever the "Watcher" patch says there is a new text

Use a "Render in Image" patch witch fixed pixel dimension to render the animation: one text image to move out and the second to move in. The Render in Image patch will help to "clip" the content of your "bar". make sure to have a "Clear" patch inside the Render in Image patch, otherwise you will get pixel garbage)

draw the result of the Render in Image patch with a Billboard to screen.

This is just a rough sketch. A different approach would be to export the "Breaking News" layer from mimoLive and implement the animation part only.

I hope you find some inspiration. I am happy to answer further questions.